"Not a very good balance between pain an pleasure,which is what sub wants. "

How the fuck do you know what the sub wants? For some this would be too much - for others this would be a mild workout or be exactly what they want. Usual inane comments from people who don't understand bdsm or who think that the way they play themselves is the only way to play.

This is obviously a testing scene but undoubtedly fully consensual.

And contrary to 'information' given below, plain white paraffin wax that is evidently used here doesn't melt at too high a temperature and really is not too painful. It is when colours or scents are added to the wax that the melting temperature is raised and any such candle must be tested before use on a sub. I know a girl who carried visible marks for over a year when the top used a coloured candle without testing it first.

Darkstarblue and others are right:
That man IS! an Asshole bcs even BDSM MUST be consensual in a certain way and I cannot find anything in that direction here :-(
And I am very fond of BDSM, but not like this...

*They're*
This video would have been about five minutes long if everything wasn't repeated so many times.
I also belive he crossed a line with the wax, white wax burns so much hotter than, say coloured wax, and pouring that much on in one go...it's a wonder she didn't come away with second degree burns all over he back.

I also think he crossed sometimes her borders, on the other side normaly she can use a stopword. But i missed something in the game, he's just toturing without a hug or a nice word sometimes.
It could be she just like to play that way and not every Master is the same. And indeed as Master to Master, he's an asshole like he's doing now, maybe he just cut out the loving scenes and that's a shame.